I was wondering if i could use my xite1 as main soundboard, and add a scope card and use it only as xtc, to use it into samplitude as vst-plugins ?
I think not, cause DAW can't handle 2 soundcards, but i'm not sure about this fact.
Thanks !

I don't think the model you propose will work, but I have something similar using live as XTC-host (PCI) and running XITE as a standalone (no ASIO drivers running) environment, connecting the two with ADAT. It kinda worked, but Live kept on crashing.
I never could figure out if live was the problem or Scope running in XTC-mode.

However, I do believe that if you can get a stable XTC-environment up and running on either the PCI-cards or the XITE and then route the XTC output to your SCOPE-standalone system it will work nicely